integrating wastewater treatment and algal carbon …paul kadota october 12, 2012 co-authors...
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Integrating Wastewater Treatment and Algal Carbon
Capture
Presented atBIO Pacific Rim Summit, Vancouver
ByPaul Kadota
October 12, 2012
Co-Authors
National Research Council of Canada (Halifax, NS)Aquatic and Crop Resource Development
Patrick McGinn, PhD
Kyoung Park, PhD
Outline
1. Metro Vancouver – the regional government
2. Integrated Resource Recovery opportunities
3. Laboratory cultivation
4. Cultivation results
5. Next Steps
• 24 local governments
• Primary roles: water, sewerage,
solid waste, air quality, parks,
regional planning
• Population: 2.3 million
Metro Vancouver
Sewerage System
Lions Gate
Iona
Lulu
Annacis
NWL
Metro Vancouver
Integrated Resource Recovery (IRR)
IRR Opportunities
New Iona Island WWTP
IRR Opportunities
National Research
Council
Emissions +
WWTP Effluent
Bioproducts
IRR Opportunities
Dissolved nutrient analysis of Annacis Island WWTP effluent
WastewaterType
NH3-N PO43--P TKN
Nitrate +
NitriteTOC
(mg/L) (mg/L) (mg/L) (mg/L) (mg/L)
Final Effluent 1 (FE1)
13.8 0.75 5.52 0.38 13.5
Final Effluent 2 (FE2)
15.3 0.91 12.0 0.72 14.6
Centrate 1280 231 1040 11.04 194
Laboratory Cultivation
Growing media treatments
Media Designation
NH3-N PO4-P TOC
(mg/L) (mg/L) (mg/L)
FE1 13.8 0.75 13.5
FE1-Centrate(1%) 26.4 3.06 15.9
FE2 15.3 0.91 14.6
FE2-Centrate(1%) 28.1 3.2 16.5
DIH2O-Centrate(1%)
12.8 2.31 1.94
Laboratory Cultivation
Shake-Flask Growth Trials
Two microalgae species grown in Annacis Island
effluent:
Scenedesmus sp. AMDD
Chlorella sorokiniana
Growth Conditions
75 mol photons m-2 s-1
22 C
2% CO2 in air
Laboratory Cultivation
Microalgae Growth Curves
Scenedesmus sp. AMDD
Chlorella sorokiniana
Cultivation Results
Effect of Further Centrate Additions
Microalgae Species
Wastewater Type
Final Biomass
Cell Number
Growth Rate
Nutrient Removal
(g L-1
) (cells mL-1
) (div. d-1
) (NH3-N, %) PO4-P, %)
Scenedesmus sp. AMDD
FE2-Centrate(2%)
0.98 33877333 1.88 99.8 100
FE2-Centrate(5%)
1.12 34003692 1.88 99.9 100
FE2-Centrate(10%)
0.68 24509538 2.60 75.6 57.5
•100% nutrient removal observed at 2% and 5% centrate addition
•10% centrate addition lowered final biomass quantity
Cultivation Results
Summary
Annacis Island wastewater effluent is a useful resource for
the intensive cultivation of freshwater microalgae
Yields of Scenedesmus sp. AMDD biomass were
significantly enhanced to >1.1 g/L in effluents blended with
5% centrate wastewater
Nitrogen and phosphorus were completely recovered by
algal growth in effluent blended with 5% centrate; nutrient
recovery was reduced in effluent cultures blended with 10%
centrate
Cultivation Results
Pilot Test
Requirements to move from lab to industrial setting
• Consortium
– Qualified people with knowledge
– Better / cost efficient technologies
– Financial backing
– Industrial site
– Governments, private sector, industries, academics
Next Steps
Industrial Site
Next Steps
Sustainability Academy:
Annacis Wastewater Centre
The Challenge
By 2014, answer this:
“Should algal cultivation processes be specified in the design of the new Iona Island WWTP?”